Computational study of an overmoded, with diameter to wavelength ratio ≈ 8, slow-wave structure (SWS) of a relativistic backward-wave oscillator (BWO) operating in the E-band frequency range

Abstract

The dispersion diagram of a uniform 20-period highly overmoded, with average diameter to 75 GHz operating wavelength ratio ≈ 8, slow-wave structure (SWS) designed to operate in E-band frequency range is numerically calculated using the SuperFish code. It is shown as a result of calculations that, while the lower-order TM01 mode of the SWS is slowed down by the corrugated structure of the E-band SWS, the higher-order TM0n modes are not slowed down.